Dimensions of stefan's constant are a) [Lºm' Tk c) [L'M TKI b) [L'Mº TK d) (L'MTK
Answers
Answer:
Explanation:
Power radiated by a body P=σAeT
4
where σ is the Stefan's constant, e is the emmissivity of the body, A is the surface area of the body and T is its temperature.
Dimensions of power [P]=[ML
2
T
−3
]
Dimensions of area [A]=[L
2
]
Dimensions of temperature [t]=[K]
Emmissivity e is a dimensionless quantity.
∴ Dimensions of Stefan's constant [σ]=
[L
2
][K
4
]
[ML
2
T
−3
]
⟹ [σ]=[M
1
L
0
T
−3
K
−4
]
Answer:
Power radiated by a body P = oAeT4 where o is the Stefan's constant, e is the emmissivity of the body, A is the surface area of the body and T is its temperature. Dimensions of power [P] = [ML²T-³]
Dimensions of area [A] = [L²]
Dimensions of temperature [t] = [K] Emmissivity e is a dimensionless quantity. .:. Dimensions of Stefan's constant [o] = =
[ML²T-3]
[L²] [K4]
[o] = [M¹LºT-³K-4]